Physicochemical Properties of Peptide



PPepDB ID:PPepDB_5355
Number of amino acids:291
Molecular Weight:33146.67 Da
Theoretical pI:9.31


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)165.5%
Cysteine CYS (C)41.37%
Glutamic Acid GLU (E)134.47%
Aspartic Acid ASP (D)134.47%
Glycine GLY (G)258.59%
Phynylalanine PHE (F)237.9%
Isoleucine ILE (I)93.09%
Histidine HIS (H)51.72%
Lysine LYS (K)186.19%
Methionine MET (M)82.75%
Leucine LEU (L)227.56%
Asparagine ASN (N)165.5%
Glutamine GLN (Q)103.44%
Proline PRO (P)134.47%
Serine SER (S)248.25%
Arginine ARG (R)175.84%
Threonine THR (T)175.84%
Tryptophan TRP (W)72.41%
Valine VAL (V)186.19%
Tyrosine TYR (Y)134.47%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC1503
HydrogenH2263
NitrogenN403
OxygenO424
SulphurS12

FormulaC1503H2263N403O424S12
Total Number of Atoms:4605


Total number of positively charged residues (ARG + LYS):35
Total number of negatively charged residues (ASP + GLU):26
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    58120
Absorption 0.1% (=1 g/l)    1.753,   assuming all pairs of CYS residues form cystines

Ext. coefficient    57870
Absorption 0.1% (=1 g/l)    1.746,   assuming all CYS residues are reduced
Aromaticity:0.148

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 36.56

This indicates that the protein/peptide is stable
Secondary Structure Fraction [Helix, Turn, Sheet]:[31.62, 26.80, 20.27]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:64.9828
Grand average of hydropathicity (GRAVY):-0.38